C# Class MyMediaLite.RatingPrediction.UserKNN

Weighted user-based kNN

Inheritance: KNN, IUserSimilarityProvider, IFoldInRatingPredictor

Datei anzeigen Open project: zenogantner/MML-KDD

Protected Properties

Property	Type	Description
data_user	MyMediaLite.DataType.SparseBooleanMatrix

Public Methods

Method	Description
AddRating ( int user_id, int item_id, double rating ) : void
Predict ( int user_id, int item_id ) : double	Predict the rating of a given user for a given item If the user or the item are not known to the recommender, a suitable average rating is returned. To avoid this behavior for unknown entities, use CanPredict() to check before.
RemoveRating ( int user_id, int item_id ) : void
UpdateRating ( int user_id, int item_id, double rating ) : void
UserKNN ( ) : System

Protected Methods

Method	Description
AddUser ( int user_id ) : void

Method Details

AddRating() public method

public AddRating ( int user_id, int item_id, double rating ) : void
user_id	int
item_id	int
rating	double
return	void

AddUser() protected method

protected AddUser ( int user_id ) : void
user_id	int
return	void

Predict() public method

Predict the rating of a given user for a given item

If the user or the item are not known to the recommender, a suitable average rating is returned. To avoid this behavior for unknown entities, use CanPredict() to check before.

public Predict ( int user_id, int item_id ) : double
user_id	int	the user ID
item_id	int	the item ID
return	double

RemoveRating() public method

public RemoveRating ( int user_id, int item_id ) : void
user_id	int
item_id	int
return	void

UpdateRating() public method

public UpdateRating ( int user_id, int item_id, double rating ) : void
user_id	int
item_id	int
rating	double
return	void

UserKNN() public method

public UserKNN ( ) : System
return	System

Property Details

data_user protected_oe property

boolean matrix indicating which user rated which item

protected SparseBooleanMatrix,MyMediaLite.DataType data_user
return	MyMediaLite.DataType.SparseBooleanMatrix